Picture dating scan
This scan may be done using a probe placed inside the vagina, instead of the usual abdominal scanning equipment.Although captioned as an 'x-ray of 900lb man', many have suggested it looks more like a 3D model. Either way it gives an insight into the incredible pressure obesity puts on the human skeleton.
As a general guide they may include: Some doctors or ultrasound centres will also offer private scans for a fee.
Your doctor may also offer you additional ultrasound scans at your antenatal appointments so that he can check the health of your baby and rule out any problems.
This is the shocking image which claims to be an x-ray of a 64-stone man.
The picture, which has gone viral on Twitter, appears to show a hugely obese man standing with his hands out to either side.
If you have previously miscarried or you have had bleeding in the first few weeks of this pregnancy, you may be offered an early scan between six and 10 weeks.This is to reassure you and end the uncertainty of not knowing how your pregnancy is faring.